CN201375893Y - Circulating fluidized bed gas cyclone device - Google Patents
Circulating fluidized bed gas cyclone device Download PDFInfo
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- CN201375893Y CN201375893Y CN200920129051U CN200920129051U CN201375893Y CN 201375893 Y CN201375893 Y CN 201375893Y CN 200920129051 U CN200920129051 U CN 200920129051U CN 200920129051 U CN200920129051 U CN 200920129051U CN 201375893 Y CN201375893 Y CN 201375893Y
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- venturi tube
- venturi
- cyclone
- fluidized bed
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Abstract
The utility model discloses a circulating fluidized bed gas cyclone device, which comprises a desulfurization tower main body, an atomizing nozzle and a Venturi fluidized section arranged on the lower portion of the desulfurization tower main body. The Venturi fluidized section comprises a Venturi tube throat portion and a Venturi tube divergent section, the Venturi tube throat portion is connected with the desulfurization tower main body through the Venturi tube divergent section, and a cyclone which is mounted inside the Venturi fluidized section is a spiral axial cyclone vane. Compared with the prior art, the circulating fluidized bed gas cyclone device leads air flow inside passages to have certain rotation speed through rotating the vane, thereby enabling distribution of materials entering sections of the pipelines to be more uniform, being favorable for increasing density of the sections, increasing material conveying rate, further greatly improving symmetry property and uniformity of airflow inside the bed body, and increasing desulfurization efficiency.
Description
Technical field:
The utility model belongs to the flue gas desulfurization technique field, particularly a kind of recirculating fluidized bed gas cyclone device.
Background technology:
Circulating fluidized bed technique is that a kind of high velocity air that makes fully contacts with entrained dense suspended particulate, allows flue gas fully mix in fluid bed with desulfurizing agent, and Sulphur Dioxide becomes the technology of calcium sulfite and calcium sulfate the most at last.It utilizes turbulence effect strong in the fluid bed and higher circulating ratio to strengthen contacting of collision between solid particle and solid particle and flue gas, constantly remove product by friction from adsorbent surface, expose fresh reaction surface, thereby reach good desulfuration efficiency.
Because the circulating fluidized bed desulfur process mainly occurs in the recirculating fluidized bed tower, in order to improve desulfuration efficiency, need distribute different tower heights cross section overdraught even as far as possible, symmetry, but because the facility that basic load-bearing needs and flue is arranged of desulfurizing tower, flue gas from boiler is entered by the side at the bottom of the desulfurizing tower usually, although the integration of flue gas process Venturi tube before entering recirculating fluidized bed bed body, but still there is asymmetry in the air-flow in the bed body, usually the half side wind speed in air inlet opposite is bigger than other half side in the bed body, produce the backflow whirlpool, thereby cause the difference that sprays into the desulfurizing agent powder time of staying in fluid bed in the tower, influence the utilization rate of desulfuration efficiency and desulfurizing agent.
Summary of the invention:
For addressing the above problem, the purpose of this utility model is to provide a kind of recirculating fluidized bed gas cyclone device, can improve the symmetry and the uniformity of air-flow in the body significantly by this device, improves desulfuration efficiency.
For achieving the above object, the utility model is mainly by the following technical solutions:
A kind of recirculating fluidized bed gas cyclone device, comprise desulfurizing tower main body, atomizer and be positioned at the venturi fluidisation section of desulfurizing tower lower body part, described venturi fluidisation section comprises Venturi tube throat and Venturi tube divergent segment, Venturi tube throat is connected with the desulfurizing tower main body by the Venturi tube divergent segment, in the described venturi fluidisation section cyclone is installed, this cyclone is the axial swirl vane of spirality.
In the described Venturi tube throat coaxial cylindrical inner core is installed, between this cylindrical inner core and the Venturi tube throat cyclone is installed.
Described cyclone is installed in Venturi tube divergent segment inside.
The axial swirl vane of the described spirality elevation angle is 30 °～60 °.
The utility model is installed the axial swirl vane of spirality in venturi fluidisation section, make the air-flow in the passage produce certain rotary speed by rotating vane, thereby make the material that enters conduit section distribute more even, help increasing section concentration, improve defeated material rate, and then improve the symmetry and the uniformity of air-flow in the bed body significantly, improve desulfuration efficiency.
Description of drawings:
Fig. 1 is the structural representation of the utility model device.
Fig. 2 is the structural representation of the utility model preferred embodiment one.
Fig. 3 is a cyclone schematic cross-section among Fig. 2.
Fig. 4 is the structural representation of the utility model preferred embodiment two.
Fig. 5 is a cyclone schematic cross-section among Fig. 4.
Identifier declaration among the figure: desulfurizing tower main body 1, atomizer 2, venturi fluidisation section 3, smoke inlet 4, desulfurizing tower outlet 5, desulfurizing tower straight tube 6, Venturi tube divergent segment 7, inner core 8, Venturi tube throat 9, air door 10, ash port 11, cyclone 12, cyclone 13.
The specific embodiment:
Core concept of the present utility model is: the utility model is installed the axial swirl vane of spirality in the pipe in the Venturi tube throat of venturi fluidisation section or Venturi tube divergent segment, because the guide functions of rotating vane passage makes air-flow have certain rotary speed, going out the rotating jet that interruption-forming has certain spinning momentum, through the humidification of divergent segment enlarging to rotation, in the desulfurizing tower main body, form rotating jet with certain spin intensity, and when passing through the eddy flow convey materials, and when tangential speed maximum is greater than a certain multiple of the heavy speed of convey materials in the pipe, material then can " be lifted holder " and " suspension ", thereby make the material of conduit section distribute more even, help increasing section concentration, improve the symmetry and the uniformity of air-flow in the bed body, improve defeated material rate.
For setting forth thought of the present utility model and purpose, the utility model is described further below in conjunction with the drawings and specific embodiments.
See also shown in Figure 1ly, Fig. 1 is the structural representation of the utility model device.The utility model provides a kind of recirculating fluidized bed gas cyclone device, mainly comprise desulfurizing tower main body 1, described desulfurizing tower main body 1 upper end is provided with desulfurizing tower outlet 5, and the lower end is connected with desulfurizing tower straight tube 6, and described desulfurizing tower outlet 5 is connected with the gas approach of external belt inspissator; Desulfurizing tower straight tube 6 lower ends are connected with venturi fluidisation section 3.
Atomizer 2 wherein also is installed in desulfurizing tower main body 1,, then is installed in venturi fluidisation section 3 tops if atomizer 2 is one, desulfurizing tower main body 1 bottom centre place, and spray direction is upwards; If it is a plurality of that atomizer 2 has, then be installed in venturi fluidisation section 3 tops, on desulfurizing tower main body 1 bottom interior wall, the spray direction level is pointed to desulfurizing tower main body 1 center.
More than be to the explanation of the utility model structural principle, the utility model be described further below in conjunction with preferred embodiment.
Preferred embodiment one, as Fig. 2～shown in Figure 3, cyclone 12 described in the utility model is the axial swirl vane of spirality, it is installed between Venturi tube throat 9 and its coaxial inner core 8, and blade exit is concordant with the outlet of Venturi tube throat 9, thereby the straight composite fluidization mode of revolving of having formed eddy flow fluidisation between inner core 8 direct current fluidisations and the inner/outer tube, because the guide functions of rotating vane passage makes air-flow have certain rotary speed, going out the rotating jet that interruption-forming has certain spinning momentum, during through 7 enlargings of Venturi tube divergent segment, to having rotated humidification, in desulfurizing tower main body 1, form rotating jet with certain spin intensity, therefore fluid advances with helical form in pipe in the cyclone, the augmentation of heat transfer of the cold medium of temperature field uneven distribution in its centrifugal force helps managing, and the trend that makes the temperature field homogenising is arranged.
When by the eddy flow convey materials, and when tangential speed maximum was greater than a certain multiple of the heavy speed of convey materials in the pipe, material then " was lifted holder " and " suspension ", and this makes that the material distribution of conduit section is more even, help increasing section concentration, improve defeated material rate.
Interior cyclone fluidized bed in because with the non-homogeneous layout of fluidizing agent longshore current bedside degree, a bed material particle carries out large-sized circulating in bed, particle forms interior eddy flow, it is the inner loop that is distributed in the large scale in the whole bed.The existence of interior eddy flow has obviously improved horizontal proliferation, deflection and the mixed characteristic of fluid bed, can strengthen intergranular heat and mass, makes parameter trend uniformities such as an interior temperature and concentration.In the wet process of FGD technology, when gas flow adopts two when cutting the spray column of eddy flow, the import dead area is eliminated, and the degree of filling in the whole tower improves, and gas flow is smooth and easy, evenly rises.
Therefore, the big tangential momentum in eddy flow flow field has improved the mixing in flow field, has strengthened the transporting velocity of solid particle in the lateral cross section, helps improving the uniformity in the flue gas desulfurization recirculating fluidized bed.
Preferred embodiment two, as Fig. 4～shown in Figure 5, cyclone 13 described in the utility model is the axial swirl vane of spirality, it is installed in the Venturi tube divergent segment 7, and blade inlet is concordant with the outlet of Venturi tube throat 9, thereby the straight composite fluidization mode of revolving of having formed eddy flow fluidisation between inner core 8 direct current fluidisations and the inner/outer tube, because the guide functions of rotating vane passage makes air-flow have certain rotary speed, going out the rotating jet that interruption-forming has certain spinning momentum, during through 7 enlargings of Venturi tube divergent segment, to having rotated humidification, in desulfurizing tower main body 1, form rotating jet with certain spin intensity, therefore fluid advances with helical form in pipe in the cyclone 13, the augmentation of heat transfer of the cold medium of temperature field uneven distribution in its centrifugal force helps managing, and the trend that makes the temperature field homogenising is arranged.
When by the eddy flow convey materials, and when tangential speed maximum was greater than a certain multiple of the heavy speed of convey materials in the pipe, material then " was lifted holder " and " suspension ", and this makes that the material distribution of conduit section is more even, help increasing section concentration, improve defeated material rate.
Interior cyclone fluidized bed in because with the non-homogeneous layout of fluidizing agent longshore current bedside degree, a bed material particle carries out large-sized circulating in bed, particle forms interior eddy flow, it is the inner loop that is distributed in the large scale in the whole bed.The existence of interior eddy flow has obviously improved horizontal proliferation, deflection and the mixed characteristic of fluid bed, can strengthen intergranular heat and mass, makes parameter trend uniformities such as an interior temperature and concentration.In the wet process of FGD technology, when gas flow adopts two when cutting the spray column of eddy flow, the import dead area is eliminated, and the degree of filling in the whole tower improves, and gas flow is smooth and easy, evenly rises.
Therefore, the big tangential momentum in eddy flow flow field has improved the mixing in flow field, has strengthened the transporting velocity of solid particle in the lateral cross section, helps improving the uniformity in the flue gas desulfurization recirculating fluidized bed.
Here need to prove: the rotating vane height that above-mentioned cyclone 12, cyclone 13 are adopted can be adjusted according to actual conditions, wherein blade elevation angle theta (average angle of blade and throat circular section) is the principal element of decision swirl strength, and the preferred blade elevation angle is 30～60 ° in the present embodiment.And the quantity of blade is preferably 6,8,12,14,16 or 18.
More than a kind of recirculating fluidized bed gas cyclone device provided by the utility model is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (4)
1, a kind of recirculating fluidized bed gas cyclone device, comprise desulfurizing tower main body, atomizer and be positioned at the venturi fluidisation section of desulfurizing tower lower body part, described venturi fluidisation section comprises Venturi tube throat and Venturi tube divergent segment, Venturi tube throat is connected with the desulfurizing tower main body by the Venturi tube divergent segment, it is characterized in that: in the described venturi fluidisation section cyclone is installed, this cyclone is the axial swirl vane of spirality.
2, recirculating fluidized bed gas cyclone device according to claim 1 is characterized in that: in the described Venturi tube throat coaxial cylindrical inner core is installed, between this cylindrical inner core and the Venturi tube throat cyclone is installed.
3, recirculating fluidized bed gas cyclone device according to claim 1, it is characterized in that: described cyclone is installed in Venturi tube divergent segment inside.
4, recirculating fluidized bed gas cyclone device according to claim 1 is characterized in that: the axial swirl vane of the described spirality elevation angle is 30 °～60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920129051U CN201375893Y (en) | 2009-01-05 | 2009-01-05 | Circulating fluidized bed gas cyclone device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920129051U CN201375893Y (en) | 2009-01-05 | 2009-01-05 | Circulating fluidized bed gas cyclone device |
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| CN201375893Y true CN201375893Y (en) | 2010-01-06 |
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| CN200920129051U Expired - Lifetime CN201375893Y (en) | 2009-01-05 | 2009-01-05 | Circulating fluidized bed gas cyclone device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989279A (en) * | 2012-10-09 | 2013-03-27 | 江苏英超环保有限公司 | Waste gas treatment device |
| CN103143254A (en) * | 2013-03-22 | 2013-06-12 | 福建龙净脱硫脱硝工程有限公司 | Compound airflow generator, circulating fluidized bed tower-front two-phase premixing device and method |
| CN103611486A (en) * | 2012-09-24 | 2014-03-05 | 中国大唐集团环境技术有限公司 | Urea pyrolysis reactor applied to SCR denitration |
| CN103721501A (en) * | 2013-12-26 | 2014-04-16 | 北京布鲁斯盖环保科技发展有限公司 | Pneumatic capture device for governing smoke particulate matter 2.5 (PM2.5) |
| CN105944539A (en) * | 2016-06-17 | 2016-09-21 | 中国重型机械研究院股份公司 | Venturi type desulfurizing device adopting spray drying method and desulfurizing method of desulfurizing device |
| CN111715049A (en) * | 2020-07-02 | 2020-09-29 | 中冶华天工程技术有限公司 | Air flow disturbance device installed on circulating fluidized bed absorption tower |
-
2009
- 2009-01-05 CN CN200920129051U patent/CN201375893Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611486A (en) * | 2012-09-24 | 2014-03-05 | 中国大唐集团环境技术有限公司 | Urea pyrolysis reactor applied to SCR denitration |
| CN103611486B (en) * | 2012-09-24 | 2015-09-09 | 中国大唐集团环境技术有限公司 | A kind of urea pyrolysis reactor being applied to SCR denitration |
| CN102989279A (en) * | 2012-10-09 | 2013-03-27 | 江苏英超环保有限公司 | Waste gas treatment device |
| CN103143254A (en) * | 2013-03-22 | 2013-06-12 | 福建龙净脱硫脱硝工程有限公司 | Compound airflow generator, circulating fluidized bed tower-front two-phase premixing device and method |
| CN103721501A (en) * | 2013-12-26 | 2014-04-16 | 北京布鲁斯盖环保科技发展有限公司 | Pneumatic capture device for governing smoke particulate matter 2.5 (PM2.5) |
| CN105944539A (en) * | 2016-06-17 | 2016-09-21 | 中国重型机械研究院股份公司 | Venturi type desulfurizing device adopting spray drying method and desulfurizing method of desulfurizing device |
| CN105944539B (en) * | 2016-06-17 | 2018-10-09 | 中国重型机械研究院股份公司 | A kind of venturi type spray drying process desulfurizer and its sulfur method |
| CN111715049A (en) * | 2020-07-02 | 2020-09-29 | 中冶华天工程技术有限公司 | Air flow disturbance device installed on circulating fluidized bed absorption tower |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100106 |